2021/5/12 · VWR hplc vial caps in clear for HPLC with high quality. Home » News » lab vials » hplc vial caps with patch price Sigma hplc vial caps with patch price Sigma Material: USP Type 1, Class A, 33 Borosilicate Glass Volume: 2ml (standard volume) 1.5ml (actual volume) Application: HPLC and GC system Dimensions: 11.6 x.